Bios written and read sueccessfully. (On Xubuntu 11.10 Oneiric) Thanks for your work on this utility, Pavel Stehlik. P.S. : Possibility to rewrite Macronix_MX25L8005 status register (user value, 00->FF or something like that) would be welcome. I wont to write-protect my BIOS and besides connecting pin 3(!WP) to gnd, setting of some bits of SR is neccessary.